Below are a few quotations from selected General Conference talks by Elder D. Todd Christofferson. A complete list of his Conference talks is available at LDS.org.
From The Doctrine of Christ (April 2012):
In The Church of Jesus Christ of Latter-day Saints, “we believe all that God has revealed, all that He does now reveal, and we believe that He will yet reveal many great and important things pertaining to the Kingdom of God” (Articles of Faith 1:9). This is to say that while there is much we do not yet know, the truths and doctrine we have received have come and will continue to come by divine revelation. In some faith traditions, theologians claim equal teaching authority with the ecclesiastical hierarchy, and doctrinal matters may become a contest of opinions between them. Some rely on the ecumenical councils of the Middle Ages and their creeds. Others place primary emphasis on the reasoning of post-apostolic theologians or on biblical hermeneutics and exegesis. We value scholarship that enhances understanding, but in the Church today, just as anciently, establishing the doctrine of Christ or correcting doctrinal deviations is a matter of divine revelation to those the Lord endows with apostolic authority.
From The Divine Gift of Repentance (October 2011):
As in the days of Nehor and Korihor, we live in a time not long before the advent of Jesus Christ—in our case, the time of preparation for His Second Coming. And similarly, the message of repentance is often not welcomed. Some profess that if there is a God, He makes no real demands upon us (see Alma 18:5). Others maintain that a loving God forgives all sin based on simple confession, or if there actually is a punishment for sin, “God will beat us with a few stripes, and at last we shall be saved in the kingdom of God” (2 Nephi 28:8). Others, with Korihor, deny the very existence of Christ and any such thing as sin. Their doctrine is that values, standards, and even truth are all relative. Thus, whatever one feels is right for him or her cannot be judged by others to be wrong or sinful.
On the surface such philosophies seem appealing because they give us license to indulge any appetite or desire without concern for consequences. By using the teachings of Nehor and Korihor, we can rationalize and justify anything. When prophets come crying repentance, it “throws cold water on the party.” But in reality the prophetic call should be received with joy. Without repentance, there is no real progress or improvement in life. Pretending there is no sin does not lessen its burden and pain. Suffering for sin does not by itself change anything for the better. Only repentance leads to the sunlit uplands of a better life. And, of course, only through repentance do we gain access to the atoning grace of Jesus Christ and salvation. Repentance is a divine gift, and there should be a smile on our faces when we speak of it. It points us to freedom, confidence, and peace. Rather than interrupting the celebration, the gift of repentance is the cause for true celebration.
Also from The Divine Gift of Repentance, quoting D&C 20:30-31 and adding his own parenthetical expansions:
We know that justification [or forgiveness of sins] through the grace of our Lord and Savior Jesus Christ is just and true;
And we know also, that sanctification [or purification from the effects of sin] through the grace of our Lord and Savior Jesus Christ is just and true, to all those who love and serve God with all their mights, minds, and strength (D&C 20:30–31).
From Moral Discipline (October 2009):
By “moral discipline,” I mean self-discipline based on moral standards. Moral discipline is the consistent exercise of agency to choose the right because it is right, even when it is hard. It rejects the self-absorbed life in favor of developing character worthy of respect and true greatness through Christlike service (see Mark 10:42–45). The root of the word discipline is shared by the word disciple, suggesting to the mind the fact that conformity to the example and teachings of Jesus Christ is the ideal discipline that, coupled with His grace, forms a virtuous and morally excellent person.
From Born Again (April 2008):
It was Jesus who stated that entry into the kingdom of God requires that one be born again—born of water and of the Spirit (see John 3:3–5). His teaching about a physical and a spiritual baptism helps us understand that both our own action and the intervention of divine power are needed for this transformative rebirth — for the change from natural man to saint (see Mosiah 3:19). Paul described being born again with this simple expression: “Therefore if any man be in Christ, he is a new creature” (2 Corinthians 5:17).
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Now, the Lord cautions us to take heed since “there is a possibility that man may fall from grace” (D&C 20:32), even those who are sanctified (see vv. 32–34). As Nephi counseled: “Ye must press forward with a steadfastness in Christ, having a perfect brightness of hope, and a love of God and of all men. Wherefore, if ye shall press forward, feasting upon the word of Christ, and endure to the end, behold, thus saith the Father: Ye shall have eternal life” (2 Nephi 31:20).